compare
Pyrefly vs Pyright
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Pyrefly | Pyright |
|---|---|---|
| Language | Rust | Python |
| Licence | MIT | Other |
| Stars | 7k | 16k |
| Latest | 1.3.2 | 1.1.414 |
| Last push | 2026-10-06 | 2026-10-05 |
| Release cadence | too few releases | about 30 days between releases |
| Active contributors | 39+ commit authors on the default branch in the last 90 days | 24 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Pyrefly replaces Pyright. Alternatives to Pyright →
Full replacementType checker and language server written in Rust.
Both replace mypy. Alternatives to mypy →
Full replacementPyreflyWritten in Rust, with a language server for editors.
Full replacementPyrightAlso the engine behind Pylance in VS Code.
Pyrefly
- 1.4.0-dev.32026-10-02Pyrefly v1.4.0-dev.3pre-release
- 1.4.0-dev.22026-09-28Pyrefly v1.4.0-dev.2pre-release
- 1.3.22026-09-28Pyrefly v1.3.2
- 1.4.0-dev.12026-09-19Pyrefly v1.4.0-dev.1pre-release
- 1.2.12026-09-18Pyrefly v1.2.1
Pyrefly
unsigned The latest release, 1.3.2, carries no signature GitHub could verify.
Loading the security report
Pyright
unsigned The latest release, 1.1.414, carries no signature GitHub could verify.
Loading the security report